Working Student (m/f/d)​Indexing Platform

Company Description Since its creation in 2007 in the financial city of Frankfurt am Main, Solactive AG has grown to one of the key players in the indexing space. The German multi-asset index provider focusses on tailor-made indices, offering to its clients a faster service, with greater flexibility and at a reasonable cost. Solactive AG and its subsidiaries have become one of the fastest growing index providers over the past few years and support the leading investment banks and asset managers across the globe. We have gained global recognition for our role in the Exchange Traded Fund (ETF) industry, where we rank among the top providers worldwide for underlying indices. We also excel in diverse areas such as Structured Products and investment mandates, showcasing the wide range of our capabilities. The impact and value we bring to the market is palpable, but also in the reputation we have proudly built by being close to our customers, solidifying Solactive AG as a trusted and reliable ally in the ever-evolving global financial landscape. Job Overview Solactive's Aggregate team owns the intraday calculation of our indices: consuming live price streams, applying calculation logic across a wide range of indices, and producing a continuous output stream of index ticks throughout the trading day. The core platform is built in Java and engineered around throughput, latency, and correctness under concurrency, while custom business integrations are built in Python. As a Working Student you join a small team and contribute real, production-bound code to both, working alongside senior engineers who review your work and coach you. Your Tasks Implement well-scoped features and fixes in the Java calculation platform, such as improvements to calculation components, price stream consumption, or index tick production Write unit, integration, and performance tests, including tests for concurrent code paths where ordering and timing matter Help investigate correctness or performance issues: reproduce them, narrow them down, and propose fixes with senior guidance Build and maintain Python integrations for business teams: connectors to the calculation platform, output adapters, validation checks, and small operational tools Contribute to monitoring and developer tooling that makes calculation behaviour observable and easier to reason about Take part in design and code reviews, ask questions, and document what you learn so the next person can pick it up faster Your Profile Enrolled student in computer science, software engineering, or a closely related field Strong Java fundamentals: object-oriented design, collections, generics, and comfort reading and writing idiomatic modern Java Solid grounding in core computer science: data structures, algorithms, and complexity, and in particular a working understanding of multithreading and concurrency (threads, synchronisation, memory visibility, races and deadlocks) Openness to Python: no prior experience needed, but willi